CN108798541A - Axial convex ribs cut deslagging drilling rod in the release of hole - Google Patents
Axial convex ribs cut deslagging drilling rod in the release of hole Download PDFInfo
- Publication number
- CN108798541A CN108798541A CN201810488587.3A CN201810488587A CN108798541A CN 108798541 A CN108798541 A CN 108798541A CN 201810488587 A CN201810488587 A CN 201810488587A CN 108798541 A CN108798541 A CN 108798541A
- Authority
- CN
- China
- Prior art keywords
- rod
- convex ribs
- hole
- release
- axial
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 69
- 239000007787 solid Substances 0.000 claims 1
- 239000003818 cinder Substances 0.000 abstract description 17
- 235000008331 Pinus X rigitaeda Nutrition 0.000 abstract description 5
- 235000011613 Pinus brutia Nutrition 0.000 abstract description 5
- 241000018646 Pinus brutia Species 0.000 abstract description 5
- 239000003245 coal Substances 0.000 description 20
- 230000000694 effects Effects 0.000 description 14
- 230000008014 freezing Effects 0.000 description 5
- 238000007710 freezing Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 241000167854 Bourreria succulenta Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019693 cherries Nutrition 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/18—Pipes provided with plural fluid passages
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses axial convex ribs to cut deslagging drilling rod in the release of hole, support element including the hollow body of rod, the beam pipe being co-axially located inside the body of rod, connecting-rod body and beam pipe, it is slagging channel between body of rod inner wall and beam pipe outer wall, it is air inlet, intake tunnel inside beam pipe, the body of rod external cylindrical surface is equipped with the axial convex ribs parallel with its axial direction, and the side of convex ribs is provided with multiple pressure relief vents in an axial direction on body of rod external cylindrical surface.Occurring collapse hole in drilling, cinder can enter slagging channel by pressure relief vent, discharge active force of the cinder to drilling rod, meanwhile, axial convex ribs, which have, takes off hole ability, and so that cinder is in pine, state enters slagging channel through pressure relief vent thoroughly, until collapse hole area is unimpeded.
Description
Technical field
The invention belongs to coal mine gas extraction drill hole technical fields more particularly to a kind of suitable for high stress drilling in coal
Axial convex ribs cut deslagging drilling rod in the release of hole.
Background technology
As Coal Exploitation is deeply increasing, Circumstances of Coal Mining deteriorates, and high stress seam mining problem encountered is increasingly
It is taken seriously.During high stress drilling in coal, drilling deflection is big, deformation velocity is fast, bit freezing, breaking of rod phenomenon easily occurs, leads
Cause pore-forming effect is poor, drilling efficiency is low, drilling depth is shallow.
Currently, there are two types of the domestic drilling rods generally used in terms of the high stress drilling in coal：One is according to machinery and wind
Spiral (muscle, blade) drilling rod of the double dynamical deslagging principle of power；One is bored thoroughly with the trigone of wind power slag-discharging principle according to vortex pine
Bar, auger stem can not effectively cut the coal body that hole wall shrinks or protrudes since radius of turn is small, and Completion of Drilling Hole effect is poor.Three
Using vortex principle, deslagging ability in the case of wind power slag-discharging enhances rib drilling rod, but using deslagging effect when hydraulic slag discharging mode
It is unsatisfactory.Moreover, the above two classes drilling rod belongs to slagging channel between coal wall and drilling rod, high stress coal seam hole wall shrinks bright
In the case of aobvious or collapse hole, slagging channel easily blocks.Therefore, it is necessary to design a kind of pore-forming effect is good, slagging channel not by
The novel drill rod of drilling effect of contraction.
Published Chinese patent invention " for the porous turbulent release drilling tool of cherry coal rock drilling binary channels ", patent publication No.
For：CN203584298U has good effect using the porous turbulent release drilling rod of binary channels in terms of guard aperture and protection slagging channel
Fruit, but drilling rod does not have the ability of cutting hole wall protrusion coal body, bit freezing easily occurs, embraces and bores phenomenon, and release hole number is excessive, drilling rod
Intensity is low, breaking of rod phenomenon easily occurs, and pressure relief vent setting is unreasonable, and there are release blind areas when drilling rod rotates.
Invention content
In view of the above-mentioned problems, the present invention has cutting power and pressure relief vent slag input release anti-clogging according to the rotation of axial convex ribs
Principle, the axial convex ribs that a kind of pore-forming effect is good, drilling efficiency is high, drilling depth is deep are provided and cut deslagging drilling rod in the release of hole.
In order to achieve the above objectives, using following technical scheme.
A kind of axial direction convex ribs cut deslagging drilling rod in the release of hole, including the hollow body of rod, the note that is co-axially located inside the body of rod
The support element of flow tube, connecting-rod body and beam pipe is slagging channel between body of rod inner wall and beam pipe outer wall, is inside beam pipe
Air inlet, intake tunnel, the body of rod external cylindrical surface is equipped with the axial convex ribs parallel with its axial direction, in body of rod external cylindrical surface upper edge
The side of axial convex ribs is provided with multiple pressure relief vents.
To improve the service life and chip effect of drilling rod, wear-resistant processing can be carried out at axial convex ribs.
The external cylindrical surface of the body of rod one end is equipped with external screw thread, and the inner cylinder face of the other end is equipped with internal thread,
The external screw thread can cooperate with internal thread.
Complete be provided with of the body of rod, beam pipe, support element covers more, by by internal thread and outside between the adjacent body of rod
Screw-thread fit carries out screwed connection, is connected by plug-in unit between adjacent beam pipe.
The cross-sectional shape of the axial direction convex ribs is arc-shaped, rectangle, trapezoidal.
The shape of the pressure relief vent is round hole, strip-shaped hole.
The axial direction convex ribs are at least provided with two.
Convex ribs side is single, multiple rows of or single double be arranged alternately in an axial direction for the relief hole.
The support element includes fixed ring and supporting leg, and the Fixing shrink ring is on the outside of beam pipe and is secured to connect, institute
It states supporting leg one end to be fixedly connected with fixed ring, the other end extends radially outwardly to the body of rod along fixed ring and is fixedly connected with the body of rod.
When high stress drilling in coal, drilling will appear uneven necking down, and drilling profile has hard coal block protrusion, causes to creep into
Resistance increases, slagging channel reduced cross-sectional, bit freezing easily occurs and embrace to bore phenomenon.Using the above structure, deslagging fluid by air inlet,
Intake tunnel enters foot of hole, carries cinder and drilling is discharged by the slagging channel that rod piece inner wall and beam pipe outer wall are formed,
Slagging channel is located inside drilling rod, is protected by drilling-rod external wall, is not susceptible to clogging.When drilling rod high speed rotation, on the outside of drilling rod
Axial convex ribs there is the ability of cutting hole wall protrusion coal body, ensure pore-forming effect, reduce drilling resistance, while convex ribs can raise
The cinder of drilling lower part, makes cinder enter slagging channel through pressure relief vent under loose flow regime.If there is collapse hole, coal in drilling
Slag can enter slagging channel by pressure relief vent, discharge active force of the cinder to drilling rod, meanwhile, axial convex ribs, which have, takes off hole ability,
So that cinder is in pine, state enters slagging channel through pressure relief vent thoroughly, until collapse hole area is unimpeded.
The beneficial effects of the present invention are：1. axial convex ribs have the work that cutting hole wall protrusion coal body reduces drilling resistance
With solving the more turbulent release drilling rods of binary channels and not having cutting hole wall protrusion coal body leads to rod boring resistance great Yi bit freezings
Problem；2. axial convex ribs have the ability for raising drilling lower part cinder, so that cinder is in the state that pine floats thoroughly in the borehole, have
Conducive to hole drilling deslagging；3. pressure relief vent can reduce influence of the pressure relief vent to drilling rod intensity in single equidistant or multi-row staggered arrangement；
4. when the multi-row staggered arrangement of pressure relief vent, in drilling rod rotation, release blind area is not present in drilling rod.It is tested through field test：Axis of the present invention
Cut the ability for having outstanding cutting hole wall and protruding cinder of deslagging drilling rod in the release of hole to convex ribs, rotational resistance significantly under
The intensity of drop, the more turbulent release drilling rods of the binary channels that compares improves 40% or more, while having anti-clogging built in slagging channel, unloading
Press the advantage of hole slag input release preventing sticking.
Description of the drawings
Fig. 1 is the front view of embodiment 1；
Fig. 2 is the sectional view of Fig. 1；
Fig. 3 is the left view of Fig. 1；
Fig. 4 is the front view of embodiment 2；
Fig. 5 is the sectional view of Fig. 4.
Specific implementation mode
Illustrate that embodiments of the present invention, those skilled in the art can be by this explanations by particular specific embodiment below
Content disclosed by book understands other advantages and effect of the present invention easily.
It please refers to Fig.1.Structure, ratio, size etc. depicted in this specification institute accompanying drawings, only coordinating specification
Revealed content is not limited to the enforceable restriction item of the present invention so that those skilled in the art understands and reads
Part, therefore do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing
Under the effect of present invention can be generated and the purpose that can reach, should all still fall can cover in disclosed technology contents
In the range of.Meanwhile cited such as "upper" in this specification, "lower", "left", "right", " centre " and " one " term, also
Only being illustrated for ease of narration, rather than to limit the scope of the invention, relativeness is altered or modified, in nothing
Under essence change technology contents, when being also considered as the enforceable scope of the present invention.
As shown in Figure 1, Figure 2, Figure 3 shows, embodiment 1 cuts deslagging drilling rod in the release of hole for a kind of axial convex ribs, including hollow
The support element 3 of the body of rod 1, the beam pipe 2 being co-axially located inside the body of rod 1, connecting-rod body 1 and beam pipe 2,1 inner wall of the body of rod and note
It is slagging channel 4 between 2 outer wall of flow tube, 2 inside of beam pipe is air inlet, intake tunnel 5, and 1 external cylindrical surface of the body of rod is equipped with
With its axial parallel axial convex ribs 6, the side of convex ribs 6 is provided with multiple pressure relief vents 7 in an axial direction on 1 external cylindrical surface of the body of rod.
To improve the service life and chip effect of drilling rod, wear-resistant processing can be carried out at axial convex ribs 6.
The external cylindrical surface of 1 one end of the body of rod is equipped with external screw thread 8, and the inner cylinder face of the other end is equipped with internal thread
9, the external screw thread 8 can cooperate with internal thread 9.
Complete be provided with of the body of rod 1, beam pipe 2, support element 3 covers more, by passing through internal thread between the adjacent body of rod 1
9 and the cooperation of external screw thread 8 carry out screwed connection, connected by plug-in unit 10 between adjacent beam pipe 2.
The cross-sectional shape of the axial direction convex ribs 6 is arc-shaped, rectangle, trapezoidal.
The shape of the pressure relief vent 7 is round hole, strip-shaped hole.
The axial direction convex ribs 6 are at least provided with two.
The relief hole single setting in 6 side of convex ribs in an axial direction.
As shown in Figure 4, Figure 5, difference lies in the sides of, relief hole convex ribs 6 in an axial direction to be equipped with for embodiment 2 and embodiment 1
Two rows, while the variation of the number according to axial convex ribs 6, list is double to be arranged alternately.
The support element 3 includes fixed ring 31 and supporting leg 32, and the fixed ring 31 is sleeved on 2 outside of beam pipe and is secured to
Connection, 32 one end of the supporting leg is fixedly connected with fixed ring 31, the other end along fixed ring 31 extend radially outwardly to the body of rod 1 and with
The body of rod 1 is fixedly connected.
When high stress drilling in coal, drilling will appear uneven necking down, and drilling profile has hard coal block protrusion, causes to creep into
Resistance increases, 4 reduced cross-sectional of slagging channel, bit freezing easily occurs and embrace to bore phenomenon.Using the above structure, deslagging fluid by into
Wind, intake tunnel 5 enter foot of hole, carry cinder and are discharged by the slagging channel 4 that rod piece inner wall and 2 outer wall of beam pipe are formed
Drilling, slagging channel 4 are located inside drilling rod, are protected by 1 outer wall of the body of rod, are not susceptible to clogging.When drilling rod high speed rotation, bore
Axial convex ribs 6 on the outside of bar have the ability of cutting hole wall protrusion coal body, ensure pore-forming effect, reduce drilling resistance, while axis
The cinder that drilling lower part can be raised to convex ribs 6 makes cinder enter slagging channel 4 through pressure relief vent 7 under loose flow regime.If boring
Occurring collapse hole in hole, cinder can enter slagging channel 4 by pressure relief vent 7, discharge active force of the cinder to drilling rod, meanwhile, it is axial
Convex ribs 6, which have, takes off hole ability, and so that cinder is in pine, state enters slagging channel 4 through pressure relief vent 7 thoroughly, until collapse hole area is unimpeded.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology can all carry out modifications and changes to above-described embodiment without violating the spirit and scope of the present invention.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should by the present invention claim be covered.
Claims (8)
1. axial convex ribs cut deslagging drilling rod in the release of hole, it is characterised in that：Including the hollow body of rod, it is co-axially located inside the body of rod
Beam pipe, connecting-rod body and beam pipe support element, be slagging channel between body of rod inner wall and beam pipe outer wall, in beam pipe
Portion is air inlet, intake tunnel, and the body of rod external cylindrical surface is equipped with the axial convex ribs parallel with its axial direction, in body of rod external cylindrical surface
On the sides of convex ribs in an axial direction be provided with multiple pressure relief vents.
2. axial convex ribs cut deslagging drilling rod in the release of hole according to claim 1, it is characterised in that：The body of rod one end
External cylindrical surface is equipped with external screw thread, and the inner cylinder face of the other end is equipped with internal thread, and the external screw thread can be mutual with internal thread
Cooperation.
3. axial convex ribs cut deslagging drilling rod in the release of hole according to claim 2, it is characterised in that：The body of rod, beam pipe,
Complete be provided with of support element covers more, and screwed connection, phase are carried out by passing through internal thread and external screw thread cooperation between the adjacent body of rod
It is connected by plug-in unit between adjacent beam pipe.
4. axial convex ribs cut deslagging drilling rod in the release of hole according to claim 1, it is characterised in that：The axial direction convex ribs are at least
Equipped with two.
5. axial convex ribs cut deslagging drilling rod in the release of hole according to claim 4, it is characterised in that：The relief hole is in an axial direction
Convex ribs side is single, multiple rows of or list is double is arranged alternately.
6. the axial convex ribs cut deslagging drilling rod in the release of hole according to claim 4 or 5, it is characterised in that：The axial direction convex ribs
Cross-sectional shape be arc-shaped, rectangle, it is trapezoidal.
7. the axial convex ribs cut deslagging drilling rod in the release of hole according to claim 4 or 5, it is characterised in that：The pressure relief vent
Shape is round hole, strip-shaped hole.
8. axial convex ribs cut deslagging drilling rod in the release of hole according to claim 1, it is characterised in that：The support element includes solid
Determine ring and supporting leg, the Fixing shrink ring is on the outside of beam pipe and is secured to connect, and described supporting leg one end is fixed with fixed ring to be connected
It connects, the other end extends radially outwardly to the body of rod along fixed ring and is fixedly connected with the body of rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810488587.3A CN108798541B (en) | 2018-05-21 | 2018-05-21 | Axial convex rib hole-cutting pressure-relief internal slag-discharging drill rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810488587.3A CN108798541B (en) | 2018-05-21 | 2018-05-21 | Axial convex rib hole-cutting pressure-relief internal slag-discharging drill rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108798541A true CN108798541A (en) | 2018-11-13 |
| CN108798541B CN108798541B (en) | 2020-09-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810488587.3A Active CN108798541B (en) | 2018-05-21 | 2018-05-21 | Axial convex rib hole-cutting pressure-relief internal slag-discharging drill rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108798541B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377113A (en) * | 2020-11-29 | 2021-02-19 | 重庆梅安森科技股份有限公司 | Internal cooling drill rod |
| CN113530481A (en) * | 2021-07-09 | 2021-10-22 | 河南理工大学 | Large-drift-diameter circumferential flow supply shield pressure relief sieve pore drill rod for outburst coal seam |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202176269U (en) * | 2011-08-08 | 2012-03-28 | 平顶山市中矿机械制造有限公司 | Multifunctional projecting proof drill rod |
| CN203374220U (en) * | 2013-06-28 | 2014-01-01 | 安阳鑫龙煤业(集团)有限责任公司 | Spiral type triangular alloy drill stem |
| CN203584298U (en) * | 2013-11-15 | 2014-05-07 | 河南理工大学 | Soft coal rock drilling dual-channel porous turbulent pressure relief drill |
| CN204266948U (en) * | 2014-10-14 | 2015-04-15 | 河南理工大学 | Closed spiral guard aperture drilling tool is crept into for weak seam |
| CN204677124U (en) * | 2015-06-09 | 2015-09-30 | 河南龙腾新型钻具制造有限公司 | A kind of continuously spiral arc-shaped ribbed drill rod |
| CN208633782U (en) * | 2018-05-21 | 2019-03-22 | 河南理工大学 | Axial convex ribs cut deslagging drilling rod in the release of hole |
-
2018
- 2018-05-21 CN CN201810488587.3A patent/CN108798541B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202176269U (en) * | 2011-08-08 | 2012-03-28 | 平顶山市中矿机械制造有限公司 | Multifunctional projecting proof drill rod |
| CN203374220U (en) * | 2013-06-28 | 2014-01-01 | 安阳鑫龙煤业(集团)有限责任公司 | Spiral type triangular alloy drill stem |
| CN203584298U (en) * | 2013-11-15 | 2014-05-07 | 河南理工大学 | Soft coal rock drilling dual-channel porous turbulent pressure relief drill |
| CN204266948U (en) * | 2014-10-14 | 2015-04-15 | 河南理工大学 | Closed spiral guard aperture drilling tool is crept into for weak seam |
| CN204677124U (en) * | 2015-06-09 | 2015-09-30 | 河南龙腾新型钻具制造有限公司 | A kind of continuously spiral arc-shaped ribbed drill rod |
| CN208633782U (en) * | 2018-05-21 | 2019-03-22 | 河南理工大学 | Axial convex ribs cut deslagging drilling rod in the release of hole |
Non-Patent Citations (1)
| Title |
|---|
| 杜祥麟等: "《潜孔锤钻进技术》", 31 October 1988, 地质出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377113A (en) * | 2020-11-29 | 2021-02-19 | 重庆梅安森科技股份有限公司 | Internal cooling drill rod |
| CN113530481A (en) * | 2021-07-09 | 2021-10-22 | 河南理工大学 | Large-drift-diameter circumferential flow supply shield pressure relief sieve pore drill rod for outburst coal seam |
| CN113530481B (en) * | 2021-07-09 | 2024-01-09 | 河南理工大学 | Protruding coal seam large-diameter circumference flow supply shield pressure relief sieve mesh drill rod |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108798541B (en) | 2020-09-18 |
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